About eCalculators

Free calculators for Australian salaries, tax and super, focused on the questions that get complicated on higher incomes: Division 293, the Medicare levy surcharge, payday super, salary sacrifice and bonuses.

Who runs it

eCalculators is run by Russell Isaac, a Chartered Management Accountant (ACMA, CGMA) and member of CIMA, based in Sydney. We are not a bank, super fund, financial adviser or tax agent, and we don't sell financial products. No registered tax agent or adviser reviews these figures; they are checked against the ATO's own published rates.

How it's built

The site is built with AI tools, overseen by Russell. Every rate and threshold comes from an ATO page and is stored with the date it was last checked. Each new calculator is reviewed against those ATO pages by separate AI review passes, and Russell approves it before it goes live. Each page lists its sources and explains how the numbers are worked out. How we check figures.

Rates were last checked against ATO sources on 29 October 2026.

What it is not

General information only. The calculators don't know your full circumstances, and they don't recommend any product or strategy. For decisions, check with the ATO, a registered tax agent or a licensed financial adviser.

Contact

Spotted an error, or a figure that has changed? Email hello@ecalculators.com. We fix confirmed errors and note the date on the page.